Improvement method of wave soldering, process flow of wave soldering.

Wave soldering refers to the soldering of the molten solder (lead-tin alloy) through an electric pump or electromagnetic pump into the solder peak required by the design, or by injecting nitrogen into the solder pool, so that the printed board pre-loaded with components passes through the solder crest to realize the mechanical and electrical connection between the solder end of the component or the pin and the printed board pad.

Maintenance, operation, maintenance.

As for whether it is good or not, you will know if you try it.

People with strong receptivity can operate freely in about two or three days, and if they are a little weak, it will take about a week.

It takes at least three months to become proficient and at least one year to become proficient.

It takes two years to know it.

In fact, it all depends on the individual, you work hard to learn everything, and you can be proficient in three months.

You don't learn anything, you're lazy, and you won't be able to master it in three years.

To put it simply, wave soldering is composed of several resistors, several inductors, and several motors.

It's simple, but it's a bit difficult to go deeper.

For example, after maintenance, what are the deficiencies of the wave soldering hardware in the usual work, and how to improve it.

Notes:1High temperature precautions, 2

Chain speed per minute, 3Preheating temperature 110 degrees Celsius, 4Flux spray amount and acid value, 5

Tin cylinder temperature, 6Orbital angle, 7Peak height, 8

Whether the entrance is in a straight line.

For the operation, it is now fully computerized, and it is easy to master.

Hello, I am very happy to answer 1Wave soldering solution:- You can adjust the wave soldering parameters, such as soldering temperature, time, speed, etc., to ensure the quality of soldering.

Check the status of the welding equipment to ensure the stability of the equipment and the humidity of the metal device. - Inspect the welding materials to ensure the purity and quality of the materials. - Check that the surface of the welded material is smooth, and if not, use sandpaper or a wire brush to smooth it out.

2.Solutions for cold welding:- Increase the welding temperature and time between the lead cars to ensure the complete melting of the metal material.

Check the welding equipment and power supply** to ensure that it is stable and working properly. - Inspect the welding material to ensure its purity and quality, and replace it if it is defective. - Check whether the heating temperature of the welding material meets the specified specifications.

Check the contact area, increasing the contact area can improve the quality of the weld. Hope mine is helpful to you.

Wave soldering is a kind of welding material wave that uses the pump pressure function to make the surface layer of the molten liquid welding material produce a special form of welding material wave, and when the assembled parts with electronic components pass through the welding material wave at the corresponding angle of view, spot welding is generated in the foot welding area. The components are first heated in the heating zone of the welding machine during the conveyor conveyor process (the heating of the parts and the temperature to be reached are still regulated by the set temperature profile). In fact, in electric welding, it is usually necessary to adjust the heating temperature of the component surface, so many machines and equipment have added corresponding temperature detection devices (such as infrared detectors).

After heating, the parts enter the tin bath for electric welding. The tin bath contains molten liquid welding materials, and the nozzle at the bottom of the steel tank sprays out the corresponding form of tin waves of the welding materials, so that when the welding surface of the parts passes through the tin wave, the welding area is wetted by the welding material wave and the expansion and filling is carried out, and the electric welding and welding link is finally reached.

Wave soldering schematic.

Wave soldering machine soldering process: insert the component into the corresponding component hole Pre-apply flux Preheating (temperature 90-100'C, length Wave soldering (220-240'C) Cooling Removal of excess insert feet Check.

Wave soldering flow chart.

1. Promote the activity of flux to be fully exerted

Before the flux can work, the activator in the flux needs to be activated. These chemistries then interact with the base metal surface oxides, allowing the oxides to be removed from the base metal surface. Therefore, the PCB coated with flux needs to be heated to the activation temperature to allow this reaction to occur, such as rosin-based flux needs to be heated to about 104, and should stay at this temperature for enough time to ensure that the flux can fully purify the soldered surface of the PCB.

If only the brazing metal crest is relied on to heat the flux to the activation temperature, then it is extremely disadvantageous to extend the time that the PCB stays in the crest according to the additional time required for the flux to clean the metal surface.

2. Remove excessive volatiles in the flux to improve the soldering quality

The volatile material in most fluxes is still mixed with rosin before the PCB enters the brazing metal peak. Some organic acid fluxes also contain water. If wave soldering is performed directly in this state, the heat of the filler tank will cause the solvent to vaporize rapidly, which will not only cause sputtering in the filler metal itself, but also the vapor will be trapped in the filled filler metal to form pores.

In addition, due to the latent heat of vaporization consumed by a large amount of solvent volatilization, the temperature of the PCB soldering surface will drop sharply, which will lead to the occurrence of soldering defects such as virtual soldering, bridging, and drawing.

3. Reduce the thermal shock during wave soldering

Preheating can make the PCB temperature gradually and uniformly heated, so that the thermal shock during the slow peak soldering of the corrugated skin is minimized, the thermal stress is alleviated, the warpage and deformation of the PCB are minimized, and the mechanical flatness of the PCB is improved.

4. Reduce the thermal deterioration of components

Thanks to the preheating, thermal shock during wave soldering can be minimized, thus minimizing the risk of damage to heat-sensitive components.

5. Improve production efficiency

The pre-ignition source heat treatment also shortens the time required to heat the PCB to the wetting temperature during the wave soldering process, thereby speeding up the wave soldering process and improving production efficiency.

1. Improve the activity of flux.

2. Increase the wettability of the pad.

3. Remove harmful impurities. Peichang.

4. Reduce the cohesion of the solder to facilitate the separation of the solder between the two solder joints.